This BTLink BTL100 Bluetooth to TTL Module only has limited AT Command Set. Changing the device Name, Changing the Pin, Changing the Baud Rate,

You mainly need only these three commands to set up your device with this module and please see the information below on
how to send a command and the response you shall receive.

1. Testing the connection Before sending a AT command to the Bluetooth module, you will need to check the connection between the terminal software and the module using USB to Serial TTL module. (We sell these on eBay as well, see our other items)

To check or start programming / changing the Bluetooth to TTL module, please download and use SimpleTerm (FREE)
and add the commands shown which shall then program the devices.

To Test if Bluetooth is available to talk in command mode. (Send commands in CAPITAL letters as shown below everything within the quotes "")

Send "AT" Response"OK" (You shall receive the response shown on the Terminal Software without the quotes)

2. Changing the default baud rate using USB to Serial TTL module

Send "AT+BAUD5" - (the number (in this case 5) is dependant on the baud rate you require from the table shown below.

Response "OK19200"

BAUD RATE TABLE (In bps)

1

1200

4

9600

7

57600

A

46800

2

2400

5

19200

8

115200

B

92100

3

4800

6

38400

9

230400

C

1382400

3. Changing the default name (BTLINK-BTL100) using a USB to Serial TTL Cable

Send: "AT+NAMEyourname" - (yourname is the name you want to rename the device to have.Response: "OKsetname" (So "BTLINK-BTL100" would become "yourname in this example")
If you can reset the module once a name change happens by un powering the device and reconnecting
it, you should then be able to search the new name for the Bluetooth Module.

4. Changing default password using a USB to Serial TTL CableSend: "AT+PINxxxx" (where xxxx is your new pin number (needs to be numeric / numbers))Response: "OKsetpin"

Note:
The module will not accept an AT command when it is paired. You should notice when a device is paired as the red light
stops blinking/flashing fast and becomes a constant red light.

A suitable USB to TTL Cable or RS232 to TTL converter module is required (one that has 3.3V I/O) if you want to change these settings via your computer.

FREQUENTLY ASKED QUESTIONS:

Q: Can this Bluetooth Module be changed to or become a Master Device and talk with another one of these Bluetooth Modules?

A: NO, This can only act in SLAVE MODE, if you purchase two, they cannot talk to each other without a Master Bluetooth Module
or a PC/LAPTOP/PHONE controlling the device(s)

Q: Do you stock a Master Bluetooth Module?

A: We DO NOT stock Master Bluetooth Modules, BUT we do have Bluetooth to Serial / RS232 Adapters (Item 2755 & 2751) which can act
as a slave or master and control this module.

Q: Are these as good as the Bluetooth to RS232 devices you stock?

A: It depends - If you only require TTL logic and do not mind class 2 range then this could be an alternative to our Bluetooth to Serial Adapters
however there are distinct advantages that our Bluetooth to RS232 perform better. They have full RS232 whereas this is a TTL device which means you shall need additional expense in converting this to a Bluetooth to RS232 as you shall need a MAX3232 IC amongst other components.

Our Bluetooth to RS232 are also CE, FCC certified whereas this is more designed as a development module.
That being said they still can be CE, FCC certified but you shall need to do the testing and improve it if needed or we can provide CE, FCC testing
depending on the specification and MOQ being ordered.

Our Bluetooth to RS232 are enclosed products and are much more powerful in line of sight (Class 1 - Up to 100meters).